Syringe.



P. L. WILBUR.

SYRINGB. APPLOATION FILED APR. 1l. 19GB4 Patented Mar. 23, 1909- zal@PETER L. WTABUR. Ol" NEW YUltK, N. Y.

SYRINGE Specification of Letters Patent.

Patented March 23, 1009.

Application llled April 11, 1908. Serial No. 428,444.

To all whom it may concern:

Be it known that l, PETER li. Wimnva, of the borough of Bronx, city andState of New York, have invented a certain new and ustful Improvement inSyringes, of which the following is a specification.

This invention has for its principal object the provision of a syringeconstruction such that the operating handle may be reciprocated a numberof times before the liquid in the eharged syringe is exhausted, it beingpossible, moreover, to obtain this result by simple means especiallydirected to ease and eheapness of manufacture. A syringe constructed inaccordance with the present iuyention, embodies, moreover, means forpositively locking the syringe against the accidental or unintentionaldisrharge of the liquid therein.

ifi-the drawing aeooinlianyinp,r the present speciiication Figure 1 ismainly a longitudinal section through a syringe` embodying my presentinvention, Certain parts boing in elevation. Fig. 2 is a View similar toFig. l., showinpr the nozzle portion of tlu` syringe, this figure andthe remaining iig'ures ariI drawn to a spmewhat larger scale than Fig.

1. Fig. 3 is a similar View of thiJ opposite` or handle end of thesyringe. Fig. 4. illustrates th(l lorkinpr device for the handle theaxis about which the limiting lever swings being` pei-pendirular toilu.l plane of the paper.` l

Fig. :3 is a View of du` locking: derive looking along; the piston rod.Fig. (S is a partial interior View looking.` toward llw loft in Fig. 3.Fig. 7 is respectively, a cross section and a plan of the prrforaivdwasher (-onstitutinp` a valve wat for ilul forward und 'of thelongo-luist movable syringe tylinder when thiI latter is at the fin'wardend of its stroke. Fig; h' is respertively, a cross section and a planof 'the outwardlfir opening and inwardly dosing syringgi` dischargevalve. Fig. J is partly an elevatimi, )artly a soi-tion of thixperforated cylindriral guide for lln1 forward rnd of the syringecylinder,

Similar characters of rvfirem'p designato rorrespondiui: parts in allfigures.

The present syl-ing(l is a portable instrw nnnt in which the liquidreservoir, the ejecting piston and its c `'lindcr are readilyinanipulated as a unil ily one hand of'the usirf leavingY th(- otherhand fri-e to operate the iston backward andI forward, aportion ofliquid being; drawn into the cylinder from the l l l l l reservoirduring the former stroke and ejected from the s ringe during the latter.

' Obviouslyr such an instrument may be used for various purposes. One ofthe uses oontemplated'is that for the ready application ol alire-extinguishing liquid against a spot toward whieh the dischargenozzle is directed.

Proceeding with a description of the illustrated embodiment, (3o-axialwith and located, interiorly of a reservoir 2, conveniently ofcylindrical forni, is a cylinder or barrel 3. A solid piston 4, isadapted to work within the bore of the cylinder against a fric-tionalresistance sufficient to cause the piston and cylinder to move wgetherduring the first portion of each to and fro stroke of the piston. Thecylinder at one end is guided during this limited axial movement by theinwardly extending portions 5 of a thimble .5 affixed to end closure 6of reser Voir' 2. The opposite end of the cylinder is provided with aCap 7 which is slidably mounted in a thinihle 8 ailixed to the other endclosure l) of the reservoir.

Piston rod l0, provided with 1pistonretaining collars 1U', lli, extendslongiludi nall through cylinder 3, passing through a stui 'ng box 1l inVwhich suitable packing l l is held between disks i12, 1 lz by aretainingcap 113. A grip l2 on rod l() enables the latter to be readilypushed in and out. llurinlgr ilul irst portion of the latter mori-- montthe friction lli-tween thv piston and the bore of itsryliluli-rrausrstlutwo to movi' barllward until tlu rear rnd of the rylindm' strikesagainst tluI radial portion ."1" of thiinbll.` 5, this movement of tlulCylinder inuovvringr openings f" in thinibh` 8. .lfurther harkwardprovenant ol the piston draws in liquid. from th(` reservoir frhargidthrough capped opening 2') distrital-g(- valve I3 forimd. by shitting` adisk i3 of suitable nnttirial bring; i-los'id by tlu 4suction. W'hvn thopiston isr pnshrd forward, cylinder i moves foruard, rap T ultinnrtvlyseats itself against n uaslur lilV at the bottom of the thimhlrlhrrrlii" (dosingl olll vominuniralion throup'h oprninis nl' of thereservoir with the spare l'orv` ardly of the advancing piston. Washrrl-l further funriions as a seating for valve` 13 ulun th(` lutti-r isdrawn inward by suction, Fin-ther continued movement of thel pistonforrvs liquid ont through opening' 7 in oap 7, opening 14 in washer 14,and

, ervoir, a ey past outwardly opening discliarie valve 13', the liquidissuing through nozz o 15. This action is repeated dui'lng thereciprocation cylinder performing the function oi :i vaivil thereservoir.

For the purposeI ol' precluding the exit ol liquid when the syringe isnot in use, there is shown a locking lever conveniently made of bentwire embodyinr a pair of opposed legs 16, 1`6 whose inwar y bent ends16', 16 are swiveled in openins 1n cap 11", the wire being bent to formetere] arms 162, 162 adapted to cooperate with a cross piece 17 securedto piston rod 10. When this lever is swun to the position indicated inFigs. 1, 3, 4, an 5, the piston is forced inward to the inner limitofits movement in which position a washer 18 on the piston closes theopening 7 in cap 7, the latter being forced against Washer 14.

Having described my invention, I claim:

1. The combination of a reservoir, a c lindei ada ted to have a limitedto an fro longitu mal movement, and to close the en trance from .thereservoir into the cylindeiI when at one limit of its movement, a istonin said cylinder, means for causing a ongitudinal movement of thecylinder, simultaneously with the beginning of each piston stroke and anoutwardly opening and inwardl closin discharge valve.

2. he com ination of a reservoir, a cvlinder ada ted to have a limitedto and fro longitu mal movement and to close the entrance from the,/reservoir into the cylinder when at 4one limit of its movement, apiston in said cylinder, means for causing a longitudinal movement ofthe cylinder simultaneously with the beginning of each piston stroke, anoutwardl opening and inwardly closing discharge va ve, and means forlock ing said piston and thereby precluding the discharge of liquid.

3. In a syringe, the combination of a resinder in the reservoir ada tedto have a limited to and fro longitudina movement, and to close theentrance from the reservoir into the cylinder when at one limit of itsmovement, a iiston itting Ifriptionall tight in said cylin ,r [orcausing said longii tudinal movement of the cylinder, and an of thepiston, the longitudinally sliiitzilile f outwardly opening andinwardly-closing disi charge valve. in opening and closing;cominiiniriitioii with 4. ln a syringe, the combination of a reservoir,a cylinder in the reservoir ada ted to have a limited lo and frolimgituililin movement and to close the entrance from the reservoir intothe cylinder when at one limit of its movement, a piston fittingfrictionally tight in said cylinder for causingsaid longitudinalinoyement of the cylinder, yan outwardly opening and inwardly closingdischarge valve, and means for locking said pistony and therebyprecluding the discharge of liquid.

5. In a syringe, the combination of a cylindrical reservoir, a cylinderlocated within and (fo-axial with said reservoir, a thiinble contiguousto each end of the` reservoir which serves as a guide for thecorresponding end of the cylinder, a perforated cap at the discharge endof the cylinderka perforated washer in the thinible at that end whichserves as a seat i or said cap to thereby close the inlet from thereservoir into the cylinder. an outwardly opening;r and inwardly closingcylinder discharge valve adapted to seat itsell' against said washer, apiston rod, a cross piece thereon, and a fulcrumed locking lever adaptedto crii'pei'ate with said vcross piece.

6. The combination with a cylinder and its piston, of a piston rod, across piece onV the rod, and a fu crumed piston-locking lever adapted tocoo crate with said cross piece.

7. The com ination with a cylinder and its iiston, of a piston rodastuiling box einbo ying a retainin cap, a cross tpiece on said rod, anda pistonocking lever ulcrumed to said retaining cap and adapted tocooperate with said cross piece-i.

In testimony -whereof 1 have signed my.

name to this specification in the presence of two subscribing witnesses.

PETER il. WILBUR. Witnesses z,

(lH'As. GLAS, W. F. Farma.

